Paper fastener



Jan. 20, 1925- 1,523,494

c: P. slaLEY PAPER FASTENER Filed Dec. 26, 1922 Patented Jan. 20, 11925.

@EDR-IC IP. SIBLEY, OF DETROIT, MICHIGAN.

rares FASTENER.

Application led December 26, 1922.` Serial No. 608,857.

To @ZZ wiz-0m t may Conce/Mr Be it known that I, CEDRIC P. SIBLEY, a citizen of the United States, residing at Detroit, in the county of IVayne and State of Michigan, have invented certain new and useful Improvements in Paper Fasteners, of which the following is a specification.

This invention relates to paper fasteners and has for its object what might be termed a gang paper fastener of the prong type. So far as I am aware, no one has heretofore made a prong type fastener suitable for an automatic or semi-automatic feed into apunchiug machine. This I have accomplished by designing a blank which may be punched out of sheet metal stock and the prongs then formed over by suitable dies to form a gang of prong fasteners that may be successively driven through the paper stock and sheared off.

For the purpose of illustration, I have shown my gang fasteners as improvements of the fasteners shown in the prior Sibley Patent No. 759,440.

In the drawings:

Fig. l is a side elevation of the gang.

Fig. 2 is an end elevation of the same.

Fig. 3 is a cross section taken on the line 3 3 of Fig. l.

Fig. I shows how the gang of prong fasteners is laid out on the sheet metal for the punching operation.

Fig. 5 shows a modified form of lay out.

Fig. 6 is a perspective showing how the fasteners are driven into the paper stock.

A plurality of slotted cup-shaped heads o; are stamped out of a sheet of metal leaving the ties c to connect the heads. These heads have on either side the prongs c. These prongs are pressed up under the heads as shown in Fig. 3 at Z to anchor the prongs to the heads in a. suitable position. The slot f serves to allow the punch m to be drive-n through the head and between the prongs into the paper stock so as to out the hole ahead of the fastener. The legs or prongs of the fastener cling to the side of the punch and follow the same through the paper stock and may be turned up by the fingers after the punch is withdrawn. The small points h pressed out of the legs or prongs serve to retain the fastener in the hole after the punch has started back.

In the lay-out shown in Fig. 4 the gangs of prong fasteners may be cut out of the metal stock with very little waste as the prongs of one gang overlap with the next adjacent gang.

The lay-out shown in Fig. 5 will achieve even greater economy in stock but the G0 fasteners will have to be fed into the machine on the bias.

It will be understood that any suitable punching machine can be used to successively apply the fasteners to the paper of fasteners forward at every application of the punch. By semi-automatically I mean a suitable guide is provided while the gang of fasteners is pushed forward with the fingers'.

A stationary anvil 7c is carried by the ma- 75 chine which is projected under' the gang of fasteners. The anvil and plunger cooperate together to cut a fastener from the gang by shearing across the tie portion c.

It will be noted that the ties 0 not only 30 tie the pronged heads together so that the fasteners may be fed into the driving machine, but they serve to position the slots and the prongs with respect to the machine and with respect to the work. For instance, it

is important that the slots j in the heads of the fasteners be always properly positioned so that the punch can drive down through the slot. Heretofore this has had to be done by hand in such a machine as shown in the Sibley Patent No. 759,400. It also necessary to have the prongs always in a predetermined position with respect to the punch. The ties serve to so position the fasteners that both the prongs and the slots will properly line up with the punch.

IVhat I claim is:

l. A gang of fasteners for use in a fastener driving machine provided with a punch, comprising a plurality of heads each provided with an elongated slot and each head provided with a pair of prongs with outer free ends, and ties connecting the heads directly together, independently of the prongs and serving not only to join the heads but also being arranged so that the slots in the heads all occupy the same relative position so that each elongated slot will always be presented in proper registering position with the punch.

2. A gang of fasteners for use in a.

fastener driving machine provided vWith a hedsmd alSQSelVDg (30 POSitOll both the paper piercing punch, comprising a. phiralelongated slots and prongs so that they oe- 10 ity of heads each provided with an elon- Cupy the saine gener-a1 relative position in gated slot, each head provided with a pair each fastener, whereby they are Correctly of folded together prongs and integral ties presented to the punch and to the work. independent of the prongs connecting to- In testimony whereof I aiX my signature. gether the heads at the rims7 the said ties Y serving to form both a continuous line of CEDRIC P. SIBLEY. 

